Renewable roller mill roll

ABSTRACT

A roll for a feed mill including a basic or support roll having a number of slots around the periphery of each end of the roll and a renewable shell or sleeve press fitted onto the support roll having tabs at each end of the sleeve corresponding to the slots provided in the support roll for securing the sleeve to the support roll.

United States Patent Inventor App]. No.

Filed Patented Assignee RENEWABLE ROLLER MILL ROLL Primary Examiner-Alfred R. Guest Attorney-Wheeler, Wheeler, House & Clemency ABSTRACT: A roll for a feed mill including a basic or support 7 Claims 4 Drawing Flgs' roll having a number of slots around the periphery of each end U.S. Cl 29/129 of the roll and a renewable shell or sleeve press fitted onto the Int. Cl 1321b 31/08 support roll having tabs at each end of the sleeve correspond Field of Search 29/ 129, ing to the slots provided in the support roll for securing the 130, 148.4 R sleeve to the support r011.

Q0 Q k PATENTED M1831 IBYI i Ma y m H M w/ RENEWABLE ROLLER MlllLlL ROLL BACKGROUND OF THE INVENTION Rolls for feed mills have conventionally been made of heavy metal to provide a work surface having a long life. Once this surface becomes worn the entire roll has to be replaced by a new roll or by a roll that has been reconditioned at the factory. Either procedure is relatively expensive.

SUMMARY OF THE INVENTION The invention disclosed herein provides a roll for a feed mill having a thin inexpensive renewable shell or sleeve firmly attached to the outer surface of a support roll. The support roll is formed from a rigid material and is fixedly attached to a drive shaft. The thin renewable shell or sleeve is formed from a soft iron and is press fitted onto the support roll and firmly secured thereto by indenting tabs provided on the ends of the shell into grooves or slots in the ends of the support roll. Since the tabs are integral, that is formed from the sleeve material itself, no added devices such as clamps, bolts, retaining rings, or the like are required. The sleeve is inexpensive and is not removed until worn out, so the fact that the tabs usually are not reusable is not a disadvantage. The great simplicity of this method is very advantageous.

Other objects and advantages will become apparent from the following detailed description when read in connection with the accompanying drawing in which:

FIG. 1 is a side view in elevation of a pair of the rolls of the invention, positioned next to a feed conveyor.

FIG. 2 is a view in section of one of the rolls shown in FIG. 1.

FIG. 3 is an exploded view in perspective of one of the feed rolls of FIG. 1.

FIG. 4 is an enlarged view in perspective of a portion of the feed rollers showing the attaching tab indented into the slot.

DESCRIPTION OF THE INVENTION Although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structure. The scope of the invention is defined in the claims appended hereto.

Referring to FIG. 1 of the drawing, a pair of rolls for a feed mill are shown positioned at the end of a conveyor 12. The conveyor is merely illustrative and forms no part of the invention. The rolls 10 are supported on shafts 14 and are rotated to mill grain fed to the rolls 10 from the conveyor 12. Each of the rolls 10, as seen in FIGS. 2 and 3, includes a basic or support roll 16 and a thin renewable sleeve or shell 18 which provides the work or grinding surface for the rolls 10.

More specifically, the support roll 16 includes a cylindrical member 20 secured to a pair of parallel-spaced end plates 22 having apertures 24 to receive shaft M. The cylindrical member 20 is welded to the end plates 22 and the end plates 22 are welded to shaft 114 to provide a rigid structure. A

number of slots 26 having spaced sidewalls 28 and an angularly inclined flat bottom 30 are provided at equally spaced intervals around the outer periphery of each end of the cylinder 20. The flat bottom 30 intersects the end and the periphery of the cylinder 20. The members forming the cylinder 20 can be formed of any material which will provide a strong supporting structure, preferably heavy steel.

The work surface on the rolls M) is provided by means of the sleeve 18 which is removably mounted on the cylinder 20, and is a press-fit thereon. The inner diameter of the sleeve 18 is made substantially equal to the outer diameter of the cylinder 20. Relative movement between the sleeve 18 and the cylinder 20 is prevented by the press-fit and by means of tabs 32 which are bent into the slots 26 provided in the cylinder 20. The

sleeve 18 has a len th substantially equal to the length of the cylinder 20. The ta s 32 are cut into the edge of the shell or sleeve 1% and after press fitting the sleeve 18 onto the cylinder 20 the tabs 32 are bent down into the slots 26 to lie radially below the work surface in operative position to avoid wear on the tabs in use. Longitudinal movement between the sleeve 18 and the cylinder 20 is prevented by seating the tabs 32 firmly against the inclined surfaces 30 of the slots 26. Rotary motion between the sleeve 18 and the cylinder 20 is prevented by the engagement of the tabs 32 with the sidewalls 28 of the slots 26. Each of the tabs 32 has a width substantially equal to the width ofthe slots 26.

What is claimed is:

l. A roll for feed mill comprising a cylindrical support roll,

a thin replaceable sheet metal sleeve supported by said support roll and including means for preventing relative movement between said sleeve and] said support roll,

said means being integral with said sleeve and recessed below the working surface thereof in operative position,

said means including a slot in the support roll and an axially directed tab struck from the material of said sleeve to enter said slot.

2. A method of securing a thin sheet metal cover to the underlying surface of a roller mill roll comprising the steps of press-fitting the cover over the roll, and striking tabs axially inwardly at the ends of the cover to enter slots in the roll ends.

3. A roll according to claim 1 wherein said tab has a width substantially equal to the width of said slot.

At. A roll according to claim 3 wherein said slot has a flat bottom intersecting the end and the periphery of said support roll.

5. A roll according to claim 4 wherein said sleeve is a pressfit on the outside diameter of said support roll and wherein said means includes a number of said slots equally spaced about the periphery of each end of said support roll and said sleeve has a number of tabs corresponding to said slots.

6. A roll according to claim ll wherein. said sleeve is a pressfit on the outside diameter of said support roll.

7. A roll according to claim 6 wherein said support roll has a number of slots equally spaced about the periphery of each end of said support roll and said sleeve has a number of tabs corresponding to said slots. 

1. A roll for feed mill comprising a cylindrical support roll, a thin replaceable sheet metal sleeve supported by said support roll and including means for preventing relative movement between said sleeve and said support roll, said means being integral with said sleeve and recessed below the working surface thereof in operative position, said means including a slot in the support roll and an axially directed tab struck from the material of said sleeve to enter said slot.
 2. A method of securing a thin sheet metal cover to the underlying surface of a roller mill roll comprising the steps of press-fitting the cover over the roll, and striking tabs axially inwardly at the ends of the cover to enter slots in the roll ends.
 3. A roll according to claim 1 wherein said tab has a width substantially equal to the width of said slot.
 4. A roll according to claim 3 wherein said slot has a flat bottom intersecting the end and the periphery of said support roll.
 5. A roll according to claim 4 wherein said sleeve is a press-fit on the outside diameter of said support roll and wherein said means includes a number of said slots equally spaced about the periphery of each end of said support roll and said sleeve has a number of tabs corresponding to said slots.
 6. A roll according to claim 1 wherein said sleeve is a press-fit on the outside diameter of said support roll.
 7. A roll according to claim 6 wherein said support roll has a number of slots equally spaced about the periphery of each end of said support roll and said sleeve has a number of tabs corresponding to said slots. 